How to Fix Windows Defender Not Turning On
Windows Defender (now called Microsoft Defender Antivirus) sometimes refuses to turn on or stay o...
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3. Apply
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View listUbuntu Windows Security Compatibility Troubleshooting Guide
If you run both Ubuntu and Windows on the same machine—either in a dual-boot configuration or thr...
Fix Windows Activation Error 0x80070005 Access Denied
When you try to activate Windows and see error 0x80070005 with the message “Access Denied,” it us...
Fix 'Security Module Not Found' in Windows Defender
If you see a message in Windows Security that says something like "Security module not found" or ...
Fix 'Access Denied' When Running PowerShell Scripts
If you see Access Denied or UnauthorizedAccess when running a P...
Windows Security Cache Troubleshooting Checklist
Windows security cache stores credentials, tokens, and security policies to speed up authenticati...
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